Love this game so far!
I just have 5 suggestions (or ideas (depending if they are possible i don't know)) :
- maybe a beastiary like the item log, for more run rewards
-maybe some kind of mini bosses with a room for them and their own mob mechanics (they couldn't spawn outside of their room)
-possibly "level clearing" so you don't get swarmed when going back in explored areas
-adding an "difficulty" achievement or some kind of other achievements for example clearing a difficulty, getting all items ect...
-maybe some kind of run "scaling" by getting semi-permanent upgrades when you die that you can buy with a currency that you collect and these upgrades would be cleared away when you kill the final boss
Love your game and looking forward for new updates (btw if the game is updated fo you lose the item collection?)